The feeling you get the first time the girl of your dreams asks you out. It's the best feeling in the world, you feel you will never be sad again and nothing can ever go wrong. You are never bored, because you just think that she wants to go out with you and that makes you so happy. Anything bad that happens to you seems extremely insignificant compared to the fact that the girl of your dreams thinks you are special in some way that no one else on Earth is.

When Monique asked me out I was filled with euphoria and it seemed I would never be sad again.

A feeling of great happiness. You are having the best time of your life. Unfortunately for some, it's also one of the first symptoms of carbon monixide poisoning, hard drugs, and the fact that your bipolar disorder is about to kick in.

Euphoria means you are feeling much better than you usually do. However, since the prefix "eu-" is Greek for "normal", the implication is that the way you feel in everyday life is actually "dysphoria", a state of depression.